package chapter02;

import java.util.Scanner;

public class Training09 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入班级人数");
        int num = sc.nextInt();
        double[] score = new double[num];
        int gt80 = 0;
        int gt70 = 0;
        int gt60 = 0;
        int lt60 = 0;
        double sum = 0;
        for (int i= 0;i<score.length;i++){
            System.out.println("请输入学号是" + (i + 1) + "学生的成绩:");
            score[i] = sc.nextDouble();
            sum = sum + score[i];
            if (score[i]>=80){
                gt80++;
            }else if (score[i] >=70) {
                gt70++;
            }else if (score[i] >=60){
                gt60++;
            }else if (score[i] >=0){
                lt60++;
            }else{
                System.out.println("第" + (i+1) + "成绩格式错误");
            }
        }
        double avg = sum / score.length;
        System.out.println("全班平均成绩为：" + avg);
        System.out.println("成绩大于80分：" + gt80);
        System.out.println("成绩大于70分：" + gt70);
        System.out.println("成绩大于60分：" + gt60);
        System.out.println("成绩不及格人数：" + lt60);
    }
}
